Interwoven flat-belt-drive apparatus



Nov 27 1923. 1,475,250

-' A. SUNDH 1 INTERWOVEN FLAT BELT DRVE APPARATUS Filed Feb. 7. 1922 y 2 sheets-sheet 1 Nov. 27 1923. 1,475,250

A. suNDH TNTERWOVEN FLAT BELT DRIVE APPARATUS Filed Feb. *7. 1922 2 Sheets--Sheei'l 2 4 ll-7E 5 5] nue 1Mo@ Patented Nov, 27, 1923,

` etree I stares Wazaa AUGUST sUNnH, E` H AsTINGs-'UPoN-Hunson,new Yon-K, Assiettes To'orrs ELE- varon COMPANY, 0E JEnsErorrr, NEW JEEsEY, a conronirrron 0E nEw JERSEY.

INTEnvvovEN ELAT-BELnnnrvE nrrannrus.

Application filed February 7, 1922. seriai Natsafzie.

To @ZZ fw 710m 'it may concern n Be itknown that I, AUGUST SUNDH, a citizen ot' the United States, residing in Hastings-upon-IfIudson, in the county of lVestchester and State ot New York, have invented a new and usel'ul Improvement iu Interwoven Flat-Belt--Drive Apparatus, ot which the following is a speciiication.

The invention relates to hoisting ropes or cables tor elevators in the cross-sectional Jform of a flat belt, and more particularly to the construction of the/belt.

The object of the inventionis to obtain a belt which shall have sui'licient tensile strength so as not to stretch under a. desired load.

Another object is to obtain a. combined tensile strength andvfrictional capacity so that the belt can neither stretch nor slide under acert-ain load. f

Other objects willr also appear as hereinafter set forth. My fiat belt Ais applicable to any` of the systems wherein a Hat rope is Vused as a medium of hoisting cables or transmission of power, as in elevators, etc.

In the accompanying drawings? Figure l is a vie'wdookingV down on a sectional length of my cable or rope.

Figure 2 is across sectional view of my rope or cable, takenon line -a, Figure l.

Figure 3 Ais a ragmentof my rope or cable, showing the wires coveredwith a more or less yielding material.

Figure 4 is a section ot a -length of steel wire, partly covered with a yielding material.

Figure 5 is a view showing the application of my ropes or cables to the traction sheave of a traction elevator; one of their ends hitched to the car.

Figure 6 is a view showing my rope or cable over a ring on a traction sheave of a traction elevator,ithe ends of the rope fast toa car and counterweight. Y

Figure Referring to the diferent views in which I have shown my improved belt, steel Wires, l, are used as the Warp of a fabric belt, and

i is a view of a traction sheave,A in the surface of which are grooves to offer steel wires, 2, are used as the wootor wett; `the wires are covered with a fabric of cotton or asbestos, 8, or other kind of suitable fabric whichvhas the capacity oit being impregnated by an impregnating material when subjected Vto the process or" impregnation and otretaining the impregnated substance. lVhen the wires covered with the cotton or asbestos are tightly woven togther, the cotton or asbestos isin effect tightly weven between the wires, and practically covers up the steel wires and leaves thesurtace of the beltpractically covered with cotton or asbestos, and the steel wires do not show through or, at least, not to any great extent. They result is that when the belt surface isV in frictional contact with a pulley or traction sheave of a traction elevato-nthe frictional Yengagement between the belt and sheave is much greater vthan it would be were the belt of woven wire alone. Further, the lite of the belt is noticeably Alonger by'reason of the cotton or asbestos,

because, aside from the bending strain ot the steel wires, there is very little wear on them.A Vilhat wear thereis takes place between the sheave and the sott cotton or asbestos fabric. Generally, the belt is woven first, and afterwards it is placed in a vacuum chamber Awith hot impregnating material.

and when impregnated, is withdrawn from the chamber, and allowed to cool. The belt will look like the usual woven and impregnated brake liner for the brakes ot automa biles. Of course, I' realize that in the course of time in the use of my belt, the soft material of cotton or asbestos will wear, and may be at that instant the steel wires will show throughV the cotton or asbestos, and come into contact with the surface of the traction sheave, in which event the wire may be found to wear very fast. In order to provide against such a contingency, I have provided a` loose ring,

t, on the sheave, 5, see Figure 6. The ring may be made oi some sott material, like leather for example, or it may be of a ma terial like brake liners of an automobile.y The belt runs over the loose ring and if there .is any slip between the sheave and belt, it generally takes placepbetween the surface of the inside of the ring and sheave, consequent-ly wear of the belt is prevented,

and large Jrictional engagement obtained at c all times. On the .surface of the traction sheave, 5, in Figure 7, I have shown grooves,

6, which serve to resist the slipping of the ring, 4i, on the sheave; however,-that feature is not so important, and will be used only in those cases Vwhere extraordinary loads will be lifted by the belt. The belt may be connected to the elevator car and counterweight in any approved way. I have not gone into that especially, but vhave merely shown an ordinary simple hitch to indicate the application of my belt." I also wish it to be understood that the belt may be woven and impregnatedin various ways; the im'- portant thing is that it must have tensile strength, and such strength be distributed through the belt in such a way that the belt will havetensile strength to carry the load imposed on it without stretching and making Ythe belt of less width than when it is not under load.` I do not limit myself to the construction of woven belt hereinA shown.

My conception of invention is that a woven.r

belt can be made by a person skilled in the art of weaving belts in which the tensile strength of the belt is properly proportioned and distributed so that the beltwill keep fiat under loads and the wires thereof be covered by the. soft material. It may be that the softV material will be allowed to project out more on the wearing side of the belt than onthe other side, somewhat similar to a Afloor rug inthat respect. I am aware thata loose ring around the traction sheave of an'elevator to obtain friction and lessen wear is old, as patented to G. H. Reyno-lds, 761,401, May 31, 1904, Rope drive apparatus,

ring as Reynolds contemplated using was useless for the purpose. But, I have found in experimentation that a ring used in connection with a flat belt of steel wires and especially with my improved fiat belt, will last a long time, and is of great value for the purposes herein referred to, I believe that it is new to make use of a loose ring on va traction sheave ini connection with a flat belt of interwoven steel wires and cotton or asbestos. y

What I claim is 1, A traction sheave, an interwoven wire flat steel belt suspendedy over said sheave, and acounterweight on one end of the belt, and anelevator car on the other end, and an annular ring larger in diameter than the traction sheave, between the surface of the traction sheave and the surface of the belt.

2. In a belt for traction eleva-tors, the combination of a plurality of wire cables adapted for obtaining tensile strength and plurality of wire cables for holding the cables of tensile strength in relative places, and a woven fabric of soft material interwoven in Asaid wire cables.

3. In a belt for traction elevators, the combination of a plurality of wire cables adapt'- ed for obtaining -tensile strength and a plurality of wire Vcables for holding the cable of tensile strength Yin relative places, and .a woven fabric of soft material interwoven in said wire cables, said soft inter woven fabric being impregnated with material to cooperate with the soft material for n ,obtaining friction. but he uses the ring in connection with Intestimony whereof, I have signed my name to this specification.

AUGUST sUNDH. 

